Ultra bass II

Abstract

Audio systems are known and are used to reproduce audio signals from for example prerecorded CDs or to reproduce received radio signals. To improve the signals especially in the lower frequency range so called ultra bass is known. The invention proposes to further improve the signals in the low frequency range by introducing a feed forward control to overcome problems with supplying signals in the low frequency range with a volume that would overdrive the loudspeakers.

1 . Audio system comprising an input for receiving an audio signal and an output for supplying an output signal, processing means for processing the received audio signal and enhancing means, whereby the enhancing means comprise selecting means for selecting a part of the audio signal, and an harmonics generator for generating harmonics of the selected part of the audio signal, characterized in that the enhancing means further comprise a feed forward automatic gain control to control the gain of the harmonics generator dependent on the received input signal.  
     
     
         2 . Audio system as claimed in    claim 1   , characterized in that the audio system comprises low pass filter means to select a low part of the audio signal to be enhanced coupled between the input and the enhancing means and the feed forward control automatic gain control is coupled from the output of the low pass filter means to a control input of the enhancing means.  
     
     
         3 . Audio system according to    claim 1   , characterized in that the enhancing means comprise a feed back control to control the gain of the harmonics generator dependent on the output audio signal coupled between the output of the audio system to a control input of the enhancing means.  
     
     
         4 . Enhancing means for use in an audio system as claimed in    claim 1   .